Three-Way Catalytic Converter Preheating Control Method and System, Vehicle and Storage Medium

2:

• The three-way catalytic converter preheating control method according to claim 1, characterized in that, before the step of when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than the first temperature threshold, sending the first work instruction to the high-and-low-voltage-conversion module, the method comprises:
• obtaining the power of the high-voltage power battery in the hybrid electric vehicle.

3:

• The three-way catalytic converter preheating control method according to claim 1, characterized in that, before the step of when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than the first temperature threshold, sending the first work instruction to the high-and-low-voltage-conversion module, the method comprises:
• obtaining the power of a low-voltage battery;
• when the power of the low-voltage battery is lower than the power threshold, outputting the second working voltage to charge the low-voltage battery.

4:

• The three-way catalytic converter preheating control method according to claim 1, characterized in that, after the step of the high-and-low-voltage-conversion module outputting a second working voltage and stopping outputting the first working voltage according to the second working instruction, the method comprises:
• starting an engine of the hybrid electric vehicle according to the second operating voltage.

5:

• The three-way catalytic converter preheating control method according to claim 1, characterized in that, the switching condition is that the output duration of the first working voltage reaches a first-time threshold;
• or, the temperature of an exhaust pipe is not lower than the first temperature threshold.

7:

• The three-way catalytic converter preheating control system according to claim 6, characterized in that, the processing module is also configured to start an engine of the hybrid vehicle.

8:

• The three-way catalytic converter preheating control system according to claim 6, characterized in that, the first working voltage is 48V, and the second working voltage is 12V.

9:

• The three-way catalytic converter preheating control system according to claim 6, characterized in that, the high-and-low-voltage-conversion module comprises a high-and-low voltage-conversion circuit, and the voltage conversion circuit is configured to convert the high-voltage-power-battery voltage into the first working voltage and the second working voltage.

10:

• The three-way catalytic converter preheating control system according to claim 6, characterized in that, the high-and-low-voltage-conversion circuit comprises a high-and-low-voltage-conversion-switch circuit, a high frequency transformer, a 12V output circuit, a 48V output circuit, a 12V-output-and-48V-output-switching circuit.

11:

• The three-way catalytic converter preheating control system according to claim 6, characterized in that, the switching condition is that the output duration of the first working voltage reaches a first-time threshold;
• or, the temperature of an exhaust pipe is not lower than the first temperature threshold.

12:

• A vehicle, characterized in that, the vehicle comprises a vehicle body and the three-way catalytic converter preheating control system according to claim 6.

13:

• A storage medium, characterized in that, a computer program is stored on the storage medium, and when the computer program is executed by a computer, the three-way catalytic converter preheating control method according to claim 1 can be realized.